It's the same people that supply Lexmoto engines in the UK. It might not be a Daelim, but it's not CB-based. The cam cover/cylinder head are dead giveaways. Here's a link to what humanbeing (Chinese member on here) posted on another forum:
http://www.mychinamoto.com/forums/showthread.php?8634
If you look at the threads I've started (not too many), one of them talks about an identical engine. It's a 156FMI if I remember correctly, but basically the same motor.